Machine for grinding the surface of printing or embossing cylinders.



U. H. HOPE. MAGHINE FOR GRINDING THE SURPAGES 0F PRINTING 0B. BMBOSSING GYLINDEBS.

AYPLIOATION FILED NOV. 30, 1908.

Patented May 24, 1910.

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INVENTO N E R o T A G. H. HOPE. MACHINE FOB GRINDING THE SURFACES 0P PRINTING 0E EMBOSSING CYLINDERS.

' APPLIOATION FILED NOV.30,1908.

959, 140? Patented May 24,1910.

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, L V N O. H. HOPE.

MACHINE FOB. GEINDINQ; IHE SURFACES 0F PRINTING OB. EMBOSSING CYLINDERS.

Anmoulon mum NOV. so, was. I

Patented May 24, 1910.

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.APPLIOATION mum NOV. so, 1908.

959,140. Patented May 24,1910.

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Wa l-M55555 INvEN ;FE1'F\=" 0-. H. HOPE MACHINE FOR GRINDING 'IHE SURFACES OI PR1 APPLICATION IILED NOV. so, 1908.

NTING OR EMBOSSING CYLINDERS.

959,140. Patented May 24, 1910. 1 I 5 sums-sum 5.

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ATTORNEY.

' UNITED STATES PATENT OFFICE.

CHARLES H. HOPE, OF PROVIDENCE, RHODE ISLAND.

MACHINE FOR GRINDING THE SURFACES OF PRINTING OR EMBOSSING CYLINDERS.

Specification of Letters Patent.

Application filed November 30, 1908.

Patented May 24, 1910. SerialNo. 465,434.

To all whom it may concern:

Be it known that I, CHARLES H. Horn,

have invented a new and useful Improvement in Machines 'for Grinding the Surfaces of Printing or Embossing Cylinders, of which the following isa specification.

My invention relates to a machine in which printing or embossing cylinders may have their surfaces ound uniformly true, and it consists in a at grinding stone connected with the lower member of a socketjoint, which is held by springs against the upper member, at the lower end of an upright spindle, by means of which the stone isrotated. Figure 1 re resents a front elevation of a cylinder grin ing machine embodying my improvement. F 1g. 2 represents a top View of the same. Fig. 3 represents an end view. Fig. 4 represents a detail section in line 4, 4, of Fig. 1. Fig. 5 represents anedge view of the driving plate and the stone,

and a transverse section of the cylinder to be ground. Fig. (i represents a vertical section taken on the line 8, 8, of Fig. 9. Fig. 7 represents a top view of the driving plate for the stone shown in Fig. 8. Fig. 8 is an enlarged representation, of one of the springs employed between the grinding stone and the driving means. Fig. 9 represents a detail section showing another modification. Fig. 10 represents a top view of the plate for holding the stone.

In the drawing, A represents the bed frame of the machine, B, B represent the bearing heads which support the rotary spindle C, by means of which rotation is imparted to the cylinder l) which to be ground. The cylinder 1) is supported upon the anti-friction rollers E, I and is rotated from the face plate F by means of the stud (l, and dog H. The cylindrical surface I r of the cylinder D, which is to beground,

revolves in a trough J, containing water K, which serves to keep the surface of the cylinder l. sutlicicntf, wet for the purpose of grinding.

The sliding carriage L is operated longitudinally of the bed frame A, by means of the screw M, and rotary inovmnent is in) parted to the spindleN and the grinding stone 0. by means of the shaft U, which driven from the spindle C by means of the belt Q, pulley R, the shaft .5, provided with a longitudinal groove a, the bevel gear T splincd to rotate with the shaft .5 and move loosely along the same. a connection between the said bevel gear and the carriage L, the upright shaft l of the carriage, the bevel gear V engaging with the lnirel gear T, the bevel gear W adjustably held upon the shaft U, by means of the groove 1) and a suitable spline in the bore of the said gear, the bevel gear X engaging with the gear W, the shaft Y, and the bevel gear A which engages with r the bevel gear A upon the spindle N which carries the grinding stone 0. The spindle N is carried by the adjustable support B, the stem C of which is held for up and --down movement in the hollow standard D of the sliding carriage L,

the said support B being moved either up or down by means of the rack E, gear'F, and the hand wheel G.

At the upper part of the support B, is placed the standard H, to the end of which is pivoted the lever I having connected therewith, the center bearing screw 0 on the upright spindle N, and upon the outer portion of the said lever is placed the adjustable weight J, by means of wh ch the pressure of the grinding stone upon the surface of the cylinder may be properly varied and controlled.

To the lower end of the spindle N is attached the spider arm plate K, provided, with the downwardly extendin pins L, L, which enter the recesses M, ii, made in the upper face of the grinding stone 0, the said stone being also provided with an inserted metal disk 0 concaved at its upper surface to receive the convex end (I of the spindle N, thus forming with the said spindle a universal joint. The spider arms n, n, of the plate K are each provided at their under side with the attached flat springs Q thus forming a yielding seat for the grind ing stone, whereby any irregularity in the face of the stone will be compensated and upon raising the spindle-N with its attached plate K the stone 0 will become separated therefrom and may then be removed from the cylinder.

Another 1'; adification is shown in Figs. 7, S, 9 and 10, in which the circular plate R attached to the spindle N the said plate being provided with the brackets f, f, which project outward from the edge of the plate and between the said brackets and the pins iar end i of the spindle N and ishell thereto g, g, of the holding plate S for the stone 0 by means of the springs h, h.

are placed the contracted spiral springs h, h, I claim as my invention: by means of which the said holding plate is -In a machine for grinding the surface of held up against the" semi-circular end i of Erinting or emboseinfi cylinders, the com.- '20 the spindle N,movement of rotation being ination of an uprig t rotary spimile thoimparted ,to thestone from the pl ate R by lower end ofwhich forms an element of a, means of the downwardly extending pin 5', socket joint, 8. fiat grinding stone, and

which engages with the stud 0. eprings forholding the sookeiioint members Another modification is shown in Figs, 11 in working contact with each other. and 12 in whichthe stone 0 i9 cemented HA SH ,HUPE" I upon a flat disk plate 71" provided with a central perforation In, and the ears m, m, Witnesses: by means of which screw attachment is made Socnmns Sonowmw with the plate U which fits the semi-circa BENJAMIN LL Dm'n zs. 

